[Jeff Lee]

Like Alan said...and it pays to experiment. I even tried a bunch of weight mounted below the rear bumper frame support. That was a mistake but now I know. I've had weight at the back of the trunk area, the area above the axle housing, and in the area where there would be a rear seat (my AMX is a factory two seat car). So far I've never tried weight on the passenger side front floor or forward of the cowl.
I use lead shot filled bars as I like to displace the load more than weight box. If you do the same, start at the back of the trunk and then try 50#'s at the back and 50#'s above the axle area. Or try all 100#'s above the axle.
It's all part of the test-n-tune procedure.